EP0295250B1 - Treibanker - Google Patents

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Publication number
EP0295250B1
EP0295250B1 EP87901293A EP87901293A EP0295250B1 EP 0295250 B1 EP0295250 B1 EP 0295250B1 EP 87901293 A EP87901293 A EP 87901293A EP 87901293 A EP87901293 A EP 87901293A EP 0295250 B1 EP0295250 B1 EP 0295250B1
Authority
EP
European Patent Office
Prior art keywords
section
back section
drogue
channels
sea anchor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87901293A
Other languages
English (en)
French (fr)
Other versions
EP0295250A1 (de
EP0295250A4 (de
Inventor
William John Abernethy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT87901293T priority Critical patent/ATE81831T1/de
Publication of EP0295250A1 publication Critical patent/EP0295250A1/de
Publication of EP0295250A4 publication Critical patent/EP0295250A4/de
Application granted granted Critical
Publication of EP0295250B1 publication Critical patent/EP0295250B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/24—Anchors
    • B63B21/48—Sea-anchors; Drogues

Definitions

  • the present invention relates to a sea anchor, of the type commonly referred to as a drag anchor or drogue, having a front section forwardly tapering to a nose with means for attachment to a towing hawser and with a hollow rearwardly tapering back section, wherein longitudinal open channels are formed in the front section and lead to a hollow back section.
  • a sea anchor of the aforesaid type is described and illustrated in Australian Patent Application No. 21 634/83, having a hollow body which can be towed behind a vessel by means of a hawser connected to attachment means at the leading end of the body. Ports in the body are normally closed by spring-loaded doors to which the attachment means are operatively connected so that, when tension of the hawser reaches a predetermined level, the doors are moved inwardly to open the ports and the effective drag of the device is thereupon substantially increased.
  • the controlled restraint forwarded by such a device has been found to be very effective, particularly when required to provide emergency steering.
  • a sea anchor or drogue of the aforesaid type characterised in that each of the open channels increases in width from its front to its rear entry into the back section, an inwardly deflected baffle is fixed in each channel to increase the depth of the open channel from the front to the back and the front of the inwardly deflected baffle is spaced behind the front of the channel to form an opening leading into the body.
  • An advantage of the invention is that it provides improved stability to vessels, particularly multi-hull vessels, in adverse weather conditions.
  • the sea anchor or drogue, includes a body 10 moulded of any suitable plastics material and including a generally coned front section 11 increasing in diameter to its rear where it joins a hollow or concave frusto-conical back section 12, tapering to its closed rear end 13.
  • An axial chamber 16 is formed in the rear end of the core behind and within the body and is closed by a removable plug 17.
  • a series of small water passages 18 lead into the rear part of the chamber 16.
  • Four flow-through tubes 19 are provided within the body 10, radiating in equi-angular disposition from the core 14, each having an elongated inlet 20 through the coned front section 11 of the body and a reduced outlet 21, through the rear end 13 of the back section 12 of the body 10.
  • baffle 23 curved arcuately in cross-section and fixed to the outer parts of two succeeding flow-through tubes 19.
  • the baffles 23 are deflected inwardly towards the rear, so that the channels 22 progressively increase both in width and in depth from the front to rear, where they lead into the concave back section 12 of the body 10.
  • a series of small leaf ports 24 are formed through the frusto-conical wall of the back section 12 of the body 10.
  • a ring 25 is engaged in a diametral hole through the nose portion of the body so that a towing hawser 26 may be made fast to the device.
  • the sea anchor or drogue may be streamed off the windward side of, for example, a multi-hull vessel, and it will be found effective in reducing the speed of the boat While maintaining good stability.
  • Water directed into the concave back section 12 of the body of the device through the longitudinal channels 22 is, for the greater part, expelled forwardly and outwardly from the periphery of the back section 12 with consequent turbulence of the water and the application of drag to the boat through the hawser 26.
  • Water passing through the flow-through tubes 19 and through their restricted rear outlets 21, the stabilizer fins 15, and the configuration of the device, ensure that the drogue tracks truly.
  • the speed of the vessel will be substantially reduced by the drag of the sea anchor, and any tendency of the windward hull to lift will be obviated or very materially reduced.
  • the drogue may be brought inboard, the plug 17 removed and the chamber 19 emptied.
  • a distress signalling device (not shown) of any of a variety of types may be installed in the chamber 16, closing the passages 18, and the device may then be returned to the water, the buoyancy given by the chamber 16 maintaining the device upright in the water.
  • the modified form of sea anchor or drogue shown in FIGS. 6 to 9 inclusive has a body 30 which, rearwards of its coned nose portion 31, is formed with four equally spaced similar longitudinal channels 32 separated by longitudinal vanes 33 radiating from an axial core 34 within the body.
  • the core which may be made in two or more parts, extends into the body's back section 35, which is of hollow frusto-conical shape, tapering to its closed rear end 36.
  • the back section 35 is formed integrally with four external stabilizer fins 37 which are aligned with the vanes 33.
  • a baffle 38 curved arcuately in cross-section, is fixed in each of the channels 32, its rearwardly divergent side edges being fixed to the two vanes 33 defining the sides of the channel.
  • the front end of each of the baffles 38 is spaced behind the front of the channel 32 in which it is fixed, and the rear end of the baffle is disposed concentrically inwards of the periphery of the back section 35 of the body.
  • the rear section 35 is formed with a series of relief ports 39, as before described in relation to the embodiment of FIGS. 1 to 5.
  • a ring 40 for the attachment of a towing hawser 41 is fixed through the nose section 31 of the device.
  • the embodiment of the invention shown in FIG. 10 is substantially similar to that shown in FIGS. 6 to 9 and above described, except that the baffles 38 are omitted.
  • the body 42 has a forwardly tapered front section 43 and a back section 44 which is of hollow spherical segmental or hemi-spherical shape rather than frusto-conical.
  • the body 42 includes a nose 45 with a ring 46 for attachment of a hawser 47, the nose being formed integrally with an axial core 48 and four equidistantly spaced vanes 49 which define four longitudinal channels 50 in the body.
  • the core 48 is joined axially to the back section 44, which is formed with stabilizer fins 51 and small relief ports 52.
  • the vanes 49 and find 51 impart stability to the device, and the back section 44, and water driven into it through the longitudinal channels 50 and expelled from its periphery, apply considerable drag to the hawser 47.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Earth Drilling (AREA)
  • Piles And Underground Anchors (AREA)
  • Farming Of Fish And Shellfish (AREA)
  • Cultivation Of Seaweed (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Claims (5)

  1. Ein See- oder Schleppanker, mit einem Vorderabschnitt (10), der nach vorne hin verjüngt zu einer Nase (25) zuläuft, die eine Befestigungsvorrichtung für eine Schlepptrosse (26) aufweist, und mit einem hohlkörperförmigen nach hinten verjüngten Rückabschnitt (12), wobei der Vorderabschnitt in Längsrichtung verlaufende offene Kanäle (22) aufweist die in den hohlkörperförmigen Rückabschnitt führen: dadurch gekennzeichnet, daß die Breite jedes offenen Kanal (22) von seinem vorderen Einlaß bis zum Übergang in den Rückzbschnitt gleichmäßig zunimmt, in jedem dieser Kanäle ein Ablenkblech (23) eingesetzt ist, das die zunehmende Einlaßtiefe der offenen Kanäle in Längsrichtung festlegt und daß die Außenseite der inneren Ablenkplatte (23) abgesenkt hinter der Außenseite der offenen Kanäle (22) angeordnet ist, um eine Öffnung, die in den Ankerkörper führt, zu bilden.
  2. Ein See- oder Schleppanker nach Anspruch 1, dadurch gekennzeichnet, daß koaxial zum Ankerkörper (10) ein Kern (14) ausgebildet ist.
  3. Ein See- oder Schleppanker nach Anspruch 2, dadurch gekennzeichnet, daß die Seiten der offenen Kanäle (22) durch in Längsrichtung, vom Ankerkern ausgehende Radialflügel bestimmt werden.
  4. Ein See- oder Schleppanker nach Anspruch 2, dadurch gekennzeichnet, daß radial zum Ankerkern (14) angeordnete Durchflußröhren (19) die Seiten der Einlaßkanäle (22) definiert und daß diese Röhren Einlaßöffnungen (20) im Vorderabschnitt des Ankerkörpers sowie Auglaßöffnungen mit begrenztem Durchflußquerschnitt (21) im Rückabschnitt haben.
  5. Ein See- oder Schleppanker nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Überdrucköffnungen (24) im Rückebschnitt (12) des Ankerkörpers sowie Stabilisierungsflossen (15) hinter dem Rückabschnitt (12) vorgesehen sind.
EP87901293A 1986-02-25 1987-02-25 Treibanker Expired - Lifetime EP0295250B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87901293T ATE81831T1 (de) 1986-02-25 1987-02-25 Treibanker.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AU4789/86 1986-02-25
AUPH478986 1986-02-25
AUPI039987 1987-02-17
AU399/87 1987-02-17

Publications (3)

Publication Number Publication Date
EP0295250A1 EP0295250A1 (de) 1988-12-21
EP0295250A4 EP0295250A4 (de) 1988-12-28
EP0295250B1 true EP0295250B1 (de) 1992-10-28

Family

ID=25643059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87901293A Expired - Lifetime EP0295250B1 (de) 1986-02-25 1987-02-25 Treibanker

Country Status (7)

Country Link
US (1) US4969413A (de)
EP (1) EP0295250B1 (de)
KR (1) KR880700752A (de)
AU (1) AU599365B2 (de)
BR (1) BR8707611A (de)
CA (1) CA1308967C (de)
WO (1) WO1987004988A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR890700512A (ko) * 1987-02-17 1989-04-25 존 에번에씨 윌리엄 시이앵커
AU652631B2 (en) * 1990-11-06 1994-09-01 Sunrise Medical Ccg Inc. Fluid filled flotation mattress
BR9603599A (pt) * 1996-08-30 1998-12-22 Petroleo Brasileiro Sa Estaca para ancoragem de estruturas flutuantes e seu processo de instalação
US6739278B2 (en) 2000-03-29 2004-05-25 Steven Callahan Folding rigid-bottom boat
US6684808B2 (en) 2000-03-29 2004-02-03 Steven Callahan Boat stability and directional-control device
US6550413B2 (en) 2000-12-15 2003-04-22 Jenero Fiorentino Stabilizer ring for a sea anchor
DE10250559B4 (de) * 2002-10-30 2004-08-12 Atlas Elektronik Gmbh Endstück für eine Unterwasser-Schleppantenne
US20080141922A1 (en) * 2006-12-13 2008-06-19 Edmund Muehlner Folding torpedo anchor for marine moorings
USD815010S1 (en) * 2016-06-16 2018-04-10 Glenn Puckett Drift anchor
USD823226S1 (en) * 2017-03-29 2018-07-17 Wesley Reed Drift anchor retrieval

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB258958A (en) * 1925-07-03 1926-10-04 Telegraph Constr & Main Co Improvements in mooring anchors
US2491564A (en) * 1943-02-18 1949-12-20 Iversen Hjalmar Collapsible frame sea anchor
US2940411A (en) * 1957-09-26 1960-06-14 Russell W Bartels Collapsible boat anchor
US3064613A (en) * 1961-04-21 1962-11-20 Hubick Leonard Stabilizer for boats
FR1435960A (fr) * 1965-03-09 1966-04-22 Aerazur Constr Aeronaut Manche à air en tissu, fixe ou remorquée, avec dispositif augmentant sa stabilitédans le vent
US3310257A (en) * 1965-10-01 1967-03-21 Douglas Aircraft Co Inc Drogue for airspeed-calibration trailing static source
US3755836A (en) * 1970-09-28 1973-09-04 Itt Stabilization arrangement for communication buoys
US4096818A (en) * 1977-05-24 1978-06-27 The United States Of America As Represented By The Secretary Of The Navy Drogue type deceleration device
AU562287B2 (en) * 1982-11-23 1987-06-04 Abernethy, W.J. Sea anchor
US4562788A (en) * 1983-11-23 1986-01-07 Abernethy William John Sea anchor or changeable drag

Also Published As

Publication number Publication date
EP0295250A1 (de) 1988-12-21
US4969413A (en) 1990-11-13
BR8707611A (pt) 1989-03-14
AU7085287A (en) 1987-09-09
AU599365B2 (en) 1990-07-19
EP0295250A4 (de) 1988-12-28
CA1308967C (en) 1992-10-20
KR880700752A (ko) 1988-04-12
WO1987004988A1 (en) 1987-08-27

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